If you are really worried about notfalling asleep the root of your problem might be ,as the other user suggested, a lack of proper diet and a fitness level that doesn't support proper sleeping habits. I would try getting into a fitness class or sports program of some sort and exert yourself physically. Besides becoming a model participant and a valuable player, you will start to notice you will sleep a lot better. Also feigning insomnia is a habit of malingering that attention starved pre adult humans do to try and understand their own insignificance in the world. Trust meI know I was once 18 and I went through all the same scenarios you were describing. And someone I trusted simply told me to quit worrying about redicilous nonsense, increase my physical activity levels. And to always remember that what you see in horror films is a product of someone's fictitious imagination.